docs: def FindSolFile(shot=0, t=0, Dt=None, Mesh='Rough1', Deg=2, Deriv='D2N2', Sep=True, Pos=True, OutPath='/afs/ipp-garching.mpg.de/home/d/didiv/Python/tofu/src/Outputs_AUG/'):
      """ Identify the good Sol2D saved file in a given folder (OutPath), based on key ToFu criteria
  
      When trying to load a Sol2D object (i.e.: solution of a tomographic inversion), it may be handy to provide the key parameters (shot, time, mesh name, degree of basis functions, regularisation functional) instead of copy-pasting the full file name.
      This function identifies, within the relevant repository (OutPath), the files matching the provided criteria.
      This function only works of the automatically generated default SaveName was preserved for the Sol2D objects.
  
      Parameters
      ----------
      shot :      int
          A shot number
      t :         None / int / float
          A time value that must be contained in the time interval of the Sol2D file, must be provided if Dt is None
      Dt :        None / iterable
          A time interval that the Sol2D file has to match, must be provided if t is None
      Mesh :      str
          The name of the mesh that was used to compute the inversion
      Deg :       int
          The of the b-splines (LBF2D object) that were used to discretize the solution
      Deriv :     str
          The flag indicating the regularization functional that was used for the inversion
      Sep :       bool
          The flag value that was used for indicating whether the boundary constraint at the separatrix should be considered
      Pos :       bool
          The flag value that was used for indicating whether the positivity constraint was considered
      Outpath :   str
          The absolute path of the repository where to look
  
      Returns
      -------
      out :       None / str
          The matching file name, if any
  
      """
      assert None in [t,Dt] and not (t is None and Dt is None), "Arg t or Dt must be None, but not both !"
      LF = [ff for ff in os.listdir(OutPath) if 'TFI_Sol2D_AUG_SXR' in ff]
      LF = [ff for ff in LF if all([ss in ff for ss in ['_'+str(shot)+'_', '_'+Mesh+'_D'+str(Deg), '_Deriv'+Deriv+'_Sep'+str(Sep)+'_Pos'+str(Pos)]])]
      if len(LF)==0:
          print("No matching Sol2D file in ", OutPath)
          out = None
      LDTstr = [ff[ff.index('_Dt')+3:ff.index('s_')] for ff in LF]
      LDTstr = [(ss[:7],ss[8:]) for ss in LDTstr]
      if t is None:
          LF = [LF[ii] for ii in range(0,len(LF)) if LDTstr[ii][0]+'-'+LDTstr[ii][1]=='{0:07.4f}-{1:07.4f}'.format(Dt[0],Dt[1])]
      elif Dt is None:
          LF = [LF[ii] for ii in range(0,len(LF)) if t>=float(LDTstr[ii][0]) and t<=float(LDTstr[ii][1])]
      if len(LF)==0:
          print("No matching Sol2D file in ", OutPath)
          out = None
      elif len(LF)>1:
          print("Several matching Sol2D files in ", OutPath)
          print(LF)
          out = None
      else:
          out = LF[0]
      return out